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Finding the Fourth Proportional to 398,681,569.20, 598,022,353.80 and 398,681,569.20

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Solution

The fourth proportional to 398,681,569.20, 598,022,353.80 and 398,681,569.20 is: 598,022,353.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,681,569.20 : 598,022,353.80 = 398,681,569.20 : x
  2. Step 2: Convert to fraction form
    398,681,569.20/598,022,353.80 = 398,681,569.20/x
  3. Step 3: Cross multiply
    398,681,569.20x = 598,022,353.80 × 398,681,569.20
  4. Step 4: Simplify right side
    398,681,569.20x = 238,420,490,429,661,568
  5. Step 5: Solve for x
    x = 238,420,490,429,661,568/398,681,569.20
  6. Step 6: Final answer
    x = 598,022,353.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.